California pool signage requirements, set out in Chapter 31B of the California Building Code, oblige every public pool to display a specific set of permanent signs covering capacity, lifeguard status, emergency contacts, CPR instructions, gate access, depth, diving, spa warnings, and illness prevention. Each sign has mandated wording, a minimum letter height, and a required location. Miss one, and the local health inspector will write it up.1UpCodes. California Building Code – Chapter 31B Public Pools
Which Pools These Rules Cover
The code’s definition of “public swimming pool” is wide. It includes any pool open to the general public, pools available to members and their guests, pools serving multi-unit apartment buildings or residential developments, and pools at hotels, athletic clubs, and schools. Spas, hot tubs, and non-portable wading pools are covered under the same definition.2California Legislative Information. California Code Health and Safety Code – 116064.2 A backyard pool at a single-family home used only by the owner’s family is not a public pool and falls outside these signage rules. The moment a pool serves tenants, guests, or members, every requirement below applies.
Sign Construction and Letter Size Basics
Unless the code specifies otherwise for a particular sign, letters and numbers must be at least four inches high and clearly legible. Every sign must be permanently affixed to a wall, pole, gate, or similar structure, and placed where all pool users can see it.3UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3120B.1 General Paper notices, laminated printouts taped to a fence, or signs leaning on a chair do not meet the standard. Use materials that survive sun, chlorine, and water.
Maximum Capacity Sign
A sign must state the maximum number of users allowed in the pool at one time. The number is calculated from water surface area: one bather per 20 square feet of pool surface, one bather per 10 square feet of spa surface.4UpCodes. California Building Code – Chapter 31B Public Pools A 1,000-square-foot pool posts a capacity of 50. Inspectors verify that the posted figure matches the actual dimensions.
No Lifeguard On Duty Sign
When no lifeguard is on duty, a sign must read “NO LIFEGUARD ON DUTY” in letters at least four inches high. Directly below, in letters at least one inch high, it must warn that children under 14 should not use the pool without a parent or adult guardian present.5UpCodes. California Code 3120B.4 – No Lifeguard Sign This is the posting operators are cited for most, usually because the lettering is too small or has faded. If your pool never has a lifeguard, the sign stays up permanently.
911 and Emergency Information Sign
An emergency sign must display “911” in numerals at least four inches high. The same sign must also carry the phone number of the nearest emergency services (such as the local fire department) and the name and street address of the pool facility, all in characters at least one inch high.6UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3120B.6 Emergency Sign The facility address appears so a panicked caller can read it to a dispatcher.
CPR and Artificial Respiration Diagram
The pool enclosure must display an illustrated diagram showing artificial respiration and CPR procedures, with text at least one-quarter inch high, mounted where users can easily see and refer to it.7UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3120B.5 Artificial Respiration and Cardiopulmonary Resuscitation Sign Pre-printed, code-compliant posters are available from safety supply vendors.
Keep Gate Closed Sign
Every gate or door leading into the pool enclosure needs a sign on its exterior side reading either “KEEP GATE CLOSED” or “KEEP DOOR CLOSED.”8UpCodes. California Code 3120B.10 – Keep Closed The sign faces people approaching the pool, not swimmers already inside. It works together with California’s pool barrier rules, which are designed to keep unsupervised children out of the pool area.
No Use After Dark Sign
Pools built without the lighting required under current code must post a sign outside each entrance gate stating “NO USE OF POOL ALLOWED AFTER DARK.”9UpCodes. California Code 3120B.9 – No Use After Dark The same sign must go up temporarily at any pool where the underwater or deck lighting fails, until it is repaired.
Depth Markers
Numerical depth markers must be installed around the pool perimeter at intervals no greater than 25 feet, with additional markers at the points of maximum depth, minimum depth, each end, both sides of the shallowest and deepest areas, and at every break in slope. Markers go on the deck or coping within a few feet of the water’s edge and must reflect the actual water depth. Spas and wading pools require at least two depth markers.
No Diving Sign
Any pool with a maximum water depth of six feet or less must post “NO DIVING” signs in conspicuous locations easily visible to swimmers.10UpCodes. California Building Code – No Diving Sign Many operators add the universal no-diving symbol on the deck beside shallow-water depth markers, but the code’s requirement is the text posting.
Spa and Hot Tub Caution Sign
Spas and hot tubs need a dedicated warning sign headed by the word “CAUTION” in four-inch letters. Below the heading, in letters at least one inch high, the sign must include all of the following:
- Elderly persons, pregnant women, infants, and anyone with a health condition requiring medical care should consult a physician before entering the spa.
- Children should not use the spa without adult supervision.
- Using a spa while under the influence of alcohol, narcotics, drugs, or medication may lead to serious consequences.
- Do not use the spa alone.
- Extended exposure may cause hyperthermia, nausea, dizziness, or fainting.
All five lines are mandatory. Inspectors check for each one, and a sign missing even a single line draws a correction notice.
Emergency Shut Off Switch Label
A sign reading “EMERGENCY SHUT OFF SWITCH” in letters at least one inch high must be posted directly next to the spa’s emergency shutoff switch, so anyone can locate it quickly.11UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3120B.8
Diarrhea and Contamination Notice
A sign at the pool entrance must tell users that anyone with active diarrhea, or who has had active diarrhea within the previous 14 days, is not allowed in the pool water. The notice can use text in letters at least one inch high, a diagram, or both.12California Department of Public Health. Initial Statement of Reasons – Public Pools The 14-day window addresses Cryptosporidium, which resists standard pool chlorination.
How Inspectors Enforce These Rules
Local health departments, typically the county environmental health division, enforce pool signage through routine inspections. No public pool can open to users without written approval from the local enforcing agent, and inspections continue after construction on an ongoing basis.13UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3105B An inspector who finds missing or non-compliant signage issues a correction notice with a deadline to fix it. Repeat violations, or failure to correct, can lead the enforcing agent to order the pool closed until the facility is back in compliance.